Measurement of nitrate-nitrogen concentration in soil based on absorption spectroscopy
US8472023B2 · kind B2 · utility
10Cited by
10References
35Claims
0Family size
Assignee
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Key dates
| Filing date | May 7, 2010 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/245
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The nitrate-nitrogen concentration in soil is estimated based on the nitrate-nitrogen 200 nm absorption peak. In one embodiment, a device measures the attenuation spectrum of a soil-extractant mixture over a wavelength range that includes wavelengths in the vicinity of the 200 nm absorption peak (the spectral operating range) and then determines the nitrate-nitrogen concentration based on the attenuation spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.